Method and apparatus for making culverts of concrete.



H.l NOAH. METHOD AND APPARATUS PoR MAKING GULVERTS 0F CONCRETE.

APPLICATION FILED 00T. 26, 1908.

Patented Aug. 3, 1909.

HENRY NOAH, OF BAXTER, IOWA.

METHOD AND APPARATUS FOR MAKING GULVERTS OF CONCRETE.

Specification of Letters Patent.

Patented Aug. 3, 1909.

Application filed October 26, 1908. Serial No. a59,94.-3.

To all whom it may concern:

15e it known that l, ll'nianr Nenn, a citizen of the United States, residing at llaxter, in the county of Jasper and State of lowa, have invented a new and useful Method and Apparatus for ll/rlalting Uulverts of Concrete, of which the following is a specification.

T he object of my invention is to lessen the labor and reduce the cost of building a culvert or sewer complete in one piece from end to end from concrete and vary in diameter and length as desired.

My invention consists in the use of the method and apparatus as hereinafter set forth, pointed out in my claims and illustrated in the accompanying drawings in which:

Figure 1 is an end view of the apparatus adapted to be extended longitudinally in a ditch or on the ground where a culvert or sewer is to be constructed. Fig. 2 is a face view of an extension of 'the apparatus at some distance from the end as required in combination with what is shown in ltfig. 1 for supporting the cylindrical cover that is required for producing a mold around which the concrete is to be placed and tamped. ltig. is a longitudinal sectional view of the apparatus and shows the manner of coinbining the parts extending transversely and longitudinally as required to produce molds that may vary in diameter and length.

rlhe numeral 10 designates the main portion of the outer end of the apparatus in the form of a flat plate, preferably cast iron. fr corresponding plate 12 is shown in Fig. 2 and Fig. 3 shows the two plates 10 and 12 rigidly connected by a wooden reach 111, as required to produce one section or length of the apparatus that may vary in length and diameter as desired. la portable shaft 15 extends through bearings in the center of the plates 10 and 12 and has an eye 16 at its outer end for detachably connecting an operating bar 17 therewith as shown in Fig. 1 and as required for rotating the shaft. At the inner end of the shaft is a socket 18 for Connecting an extension of the shaft and increasing the length of the apparatus by adding' another section whenever desired.

On the outside faces of the plates 10 and 12 are movable uprights 19 and 2() and ixed across the tops of said uprights are segments 21 and 22.A The uprights have slots a and studs Z1 fixed to the plates 10 and 12 that project through said slots and serve as guides for keeping the uprights 20 perpendicular. lhe outer edges of the uprights have bearings c that engage bearers l fixed to the plates 10 and 12 and the inner edges of said uprights have fixed raclrs 23 that are engaged by gear wheels 2st fixed to the shaft 15 in such a manner that rotating the shaft will cause the segments 20 and 22 to be moved upward and downward as required for enlarging and din'iinishing the diameter of the mold at pleasure.

To the plates 10 and 12 are connected movable parts 2o and 26 that have tired segments 2'? to be moved in and out in horizontal planes in opposite direction simultaneously in the manner that the segments 21 and 22 are moved vertically by means of the shaft 15 having gear wheels 28 to engage the racks 23 as shown in Figs. 2 and 3 for enlarging and contracting the diameter' of the mold as indicated by dotted lines in Figs. 1 and 2.

W'hen a section or a plurality of sections of my apparatus are located on the ground or in a ditch where a culvert or sewer is to be constructed and the segments 21 and 27 adjusted as required to produce the diameter of the structure desired a layer of concrete is first placed on the ground upon which to rest the apparatus and to produce the bottom of the structure. Boards are then placed against the edges of the lower portions of said segn'ients and concrete fitted against them and tamped. More boards are successively thus placed as indicated by dotted lines in lligs. 1 and 2, until the apex of the segments 21 and 22 is reached in the nialing of the concrete structure. A key 29 corresponding in length with the apparatus is then placed in notches 80 in said segments and concrete placed on top as required for finishing the structure complete in one piece. After the concrete thus placed and tamped is dry and hard the boards supported on the segments 21, 22 and 27 can be released by rotating the shaft 15 as required to draw inward said segments so that said boards can be readily drawn out of the concrete structure and the complete appal ratus removed and placed in position as may be required for extending a sewer' by a continuous section added thereto by the same method that the first section was made.

Having thus set forth the construction of my apparatus and; the maenner of using,A the praetiea'l operation and Vadvantages of my .invention vvill be readily understood,

Vhat I claim as new and desire to secureV by Letters-Fatent, is: v

l. In an apparatus for making culverts and the like from concrete complete in one length, tvvo plates rigidly connected at their lower portions to be retained' at some distance apart, a rotatable shaft mounted in bearings at the, centers of said plates up- ,rights slidably connected With said plates,

segments adjustably conneetedavith the upper ends of said: uprights and means for moving said uprights up and down for enlarging the, diameterA of the culvert as set per, ends of; saidy uprights, racks fixed to the uprights and gear Wheels 'fixed to the shaft to engage the racks, for moving said uprights up and down for enlarging the dialneter ofthe culvert arranged and; combined to operate as set forth.

, 3, InV anA apparatus for making eulverts f and the like from concrete, a plate on a rotatable shaft, a rotatable, shaft yhaving a Vfixed, gear Wheel, an upright having a rack Y y vtended through saidk slot as set forth.

t. In an apparatus for making oulverts and the like, a plate having two slidesl or bars and fixed segments at their outer ends,

la rotatable shaft inv a bearing at the center of the plate, a xed pinion on the shaft, racks on the edges of said slidable barst() engage said pinion and means `to rotate said shaft to, operate as set forth.

5. `An apparatus and method of operating it for constructing a culvert orthe like complete inV oney length, comprising tvvo plates, a reachl rigidly connecting the two, plates, upright slides having fixed segments at their upper ends, a rotatable shaft inpbe'arings in the two plates, gear Wheels fixed on the shaft to engage the raeksonA the uprights, means to retain the uprghts perpendicular, slidablebars` in, horizontal bearings fixed to the saidplateasegments fixedl to the outer end of said; slidablebars,r aeks on the edges of the slidable bars, a pinioiron the rotatable`r shaft to engage said racks for moving the slidable bars simultaneously inA reverse Ways and a Aplurality of boards platedv on the segments to produce a Cylindrical mold in the manner .set forth forthe purposes stated.

HENRY NOAH. Witnesses WV. T. Tionr, CASPARKSCHMIDT, 

